Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
koeln-bonn-airport.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-23 09:17:04 UTC · ↺ Refresh
MX Hostnames
- mail2.koeln-bonn-airport.de
- mail1.koeln-bonn-airport.de
MX Priorities
- mail1.koeln-bonn-airport.de: 20
- mail2.koeln-bonn-airport.de: 20
A / AAAA Records
No A/AAAA records found.
Mail Server IPs
- 194.110.25.161 ↩ mail1.koeln-bonn-airport.de
- 194.110.25.162 ↩ mail2.koeln-bonn-airport.de
SOA Record
Raw SOA
dns3.netcologne.de hostmaster.netcologne.de 2024062062 300 3600 2419200 900
Primary NS (mname)
dns3.netcologne.de
Admin Email (rname)
hostmaster@netcologne.de
Serial
2024062062
Refresh
300s
Retry
3600s
Expire
2419200s
Minimum TTL
900s
Nameservers (NS)
dns4.netcologne.de
dns3.netcologne.de
dns5.netcologne.de
SPF Record
✓ Strict (-all)
v=spf1 a mx a:cgn-nebenan.de include:spf.protection.outlook.com include:_spf.cmail.ondemand.com ip4:194.110.25.161 ip4:194.110.25.162 ip4:194.110.25.163 ip4:52.157.149.216 ip4:35.242.247.107 ip4:34.107.8.58 ip4:34.107.88.2 ip4:35.246.224.53 -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1;p=quarantine;ruf=mailto:[email protected];sp=quarantine;fo=1:d:s;adkim=r;aspf=r
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
↳ Subdomain policy: quarantine
DKIM Selectors
✓ 1 found
mail._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: mail
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
10 records- apple-domain-verification=3akrvkeA6sWeVqFc
- BChXDQheZNCJNNCZ5CRwEe8Vt8V6q6lNOa7OdlKQlp/U9EUlJLpQxZVpxAf/KFLDn7548RxA7Zc47yMa5ScX2w==
- _telesec-domain-validation=350425_2025-07-21_YJErEHiGkI6pADt34x6k5tkY9av3OXY8Hu6QYvuDBUn0aEU73r
- d365mktkey=xgZx29SfAheW2SDpBsqX8sk9VqTtQtrHhxfyNmu0QQwx
- knowbe4-site-verification=3350564f9e9ab3c06c90725ad760b6df
- MS=ms76377809
- google-site-verification=ZqQ3DmdCL9bpiSgB4IlUh3iIpXTxEgHQ_ft7haZBVSU
- swisssign-check=l3W2TTPTHc9xbq0qYDF60KrsJGd0kqZPzogUWsC6OA
- SPFv=spf1 a mx a:cgn-nebenan.de include:spf.protection.outlook.com include:_spf.cmail.ondemand.com ip4:194.110.25.161 ip4:194.110.25.162 ip4:194.110.25.163 ip4:52.157.149.216 ip4:35.242.247.107 ip4:34.107.8.58 ip4:34.107.88.2 ip4:35.246.224.53 -all
- successfactors-site-verification=YjMwMjllNTRiMzE5Yjc4NTdlZjAyYTRiYTMwYzAwYWY5ZjQ2MmRjYzAwMjQ1MDFmZTYyN2U2ODE3MTFlOWVkNQ==
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